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Tables: amend f799a29 with a better solution + fix potential overflow (#6140)

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This commit is contained in:
ocornut 2023-02-03 22:50:43 +01:00
parent b0a936e5d4
commit c807192abc
3 changed files with 11 additions and 3 deletions
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9
imgui.cpp
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@ -8117,6 +8117,15 @@ ImGuiID ImGui::GetIDWithSeed(const char* str, const char* str_end, ImGuiID seed)
return id;
}
ImGuiID ImGui::GetIDWithSeed(int n, ImGuiID seed)
{
ImGuiID id = ImHashData(&n, sizeof(n), seed);
ImGuiContext& g = *GImGui;
if (g.DebugHookIdInfo == id)
DebugHookIdInfo(id, ImGuiDataType_S32, (void*)(intptr_t)n, NULL);
return id;
}
void ImGui::PopID()
{
ImGuiWindow* window = GImGui->CurrentWindow;

1
imgui_internal.h
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@ -3037,6 +3037,7 @@ namespace ImGui
IMGUI_API void MarkItemEdited(ImGuiID id); // Mark data associated to given item as "edited", used by IsItemDeactivatedAfterEdit() function.
IMGUI_API void PushOverrideID(ImGuiID id); // Push given value as-is at the top of the ID stack (whereas PushID combines old and new hashes)
IMGUI_API ImGuiID GetIDWithSeed(const char* str_id_begin, const char* str_id_end, ImGuiID seed);
IMGUI_API ImGuiID GetIDWithSeed(int n, ImGuiID seed);
// Basic Helpers for widget code
IMGUI_API void ItemSize(const ImVec2& size, float text_baseline_y = -1.0f);

4
imgui_tables.cpp
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@ -366,9 +366,7 @@ bool ImGui::BeginTableEx(const char* name, ImGuiID id, int columns_count, ImG
IM_ASSERT(table->ColumnsCount == columns_count && "BeginTable(): Cannot change columns count mid-frame while preserving same ID");
if (table->InstanceDataExtra.Size < instance_no)
table->InstanceDataExtra.push_back(ImGuiTableInstanceData());
char instance_desc[12];
int instance_desc_len = ImFormatString(instance_desc, IM_ARRAYSIZE(instance_desc), "##Instance%d", instance_no);
instance_id = GetIDWithSeed(instance_desc, instance_desc + instance_desc_len, id);
instance_id = GetIDWithSeed(instance_no, GetIDWithSeed("##Instances", NULL, id)); // Push "##Instance" followed by (int)instance_no in ID stack.
}
else
{